1. extrusive rock--an igneous rock formed by lava that erupted on Earth's surface
2. intrusive rock--an igneous rock formed by lava hardened beneath Earth's surface
3. porphyritic texture--the term to describe a rock with large crystals scattered on the background of much smaller crystals
Table of Contents
Section 5.2 Igneous Rocks (back to homepage)
Vocabulary
1. extrusive rock--an igneous rock formed by lava that erupted on Earth's surface
2. intrusive rock--an igneous rock formed by lava hardened beneath Earth's surface
3. porphyritic texture--the term to describe a rock with large crystals scattered on the background of much smaller crystals
Outline